Efficient operation of a diode-pumped multi-watt continuous wave Yb:KYW laser with excellent beam quality

Abstract

A diode end-pumped Yb:KYW laser with 9 W of output power operating at 1045 nm wavelength with the highest slope efficiency of 77.9% when compared to all other diodepumped Yb:KYW/KGW lasers is reported. The average beam quality (M 2 ) was 1.07 and the best optical-to-optical efficiency achieved was 36% with respect to the incident pump power.

Conical refraction Nd:CALGO laser with dual-wavelength output

“…By exploiting this feature, the oscillating wavelength with higher spectral intensity can be further suppressed so that DW components with equal intensities can be generated. In a similar fashion, the wavelength of the CR laser radiation can be also tuned over the available gain bandwidth of laser materials [47][48][49][50][51].…”

Power scaling of a diode-pumped Yb:YLF laser

“…Ytterbium ion doped lasers are well known as suitable laser gain media [1][2][3][4][5] for generating high output power and ultrashort pulses, thanks to their broad gain bandwidth, good thermal conductivity and low quantum defect [6][7][8][9][10][11][12][13][14][15]. In fact, efficient performance of Yb-ion doped laser hosts is attributed to their simple electronic transition between two multiplets 2 F 5/2 and 2 F 7/2 which reduces undesired processes such as excited state absorption and upconversion [4,5].…”

Dual-wavelength Nd:YVO laser with c-cut crystal geometry

“…The BRFs have wavelength-dependent transmission profiles that makes them useful for selective wavelength tuning [21][22][23]. In case of broadband laser gain hosts [24][25][26][27][28][29][30] that are usually used for ultrashort pulse generation [31][32][33][34][35], BRFs can provide continuous wavelength tuning, where equal net gain is provided for two spectral lines by two adjacent transmission peaks of the filter. The separation of the oscillating wavelength pair can be determined by the free-spectral range (FSR) of the filter [14,15,[36][37][38] or the differential loss around a single transmission peak of the filter.…”